Valve for two-line steam heating systems



Nov. 21, 1933.

E. c. BOLDT ,936,l25

V'ALVE FOR TWO-LINE STEAM HEATING SYSTEMS Original Filed July 7, 1931 Patented Nov. 21, 1933 i-,86,125 v i 5 sYsTEMs s y i Edward C. Boldt, MinneapolisrMinn. Application July 7, 1931,tSeria1No. 549,233

HEATNG This invention relates to improvements in steam heating systems and pertains particularlyto an improved form of valve for use in such systems.

`The primary object of thepresentinvention is to provide a new andnoVeltype of valve designed particularlyfor use in a two line steam heating system, which will' prevent steam being by-passed from one radiator to another' in` the system through the air line of the system.

Another object of the invention is to provide avnovel type of valve which will prevent the accumulation of water in the radiator and will also prevent pounding or knocking.

The invention will be best understood from a consideration of the following detailed description taken in connection with theaccompanying' drawing forming part of this specification, with the understanding, howeventhat the invention is not confined to any strict conformity with the showing of -the drawing but may be changed -or modified so long as such changes or modifications mark nomaterial departure from the salient features of the invention as expressed in the appended claims.

In the drawing:- i

Figure 1 shows two radiators connected in a v tributing pipe line 3. A pair of radiators, each of which is indicated by the numeral 4, is shown connected by means of the usual valves 5 and the pipes 6, with the steam distributing pipe 3.

The pipe line 7 comprises the air and steam and water escape' means for the radiators, this pipe being in communication withthe boiler 1 by the return pipe 8 and also being in communication with an exhaust pipe 9 which is vertically disposed and has the upper end, which is positioned at a higher elevation than the pipe 7, closed by a suitable relief valve 10. v Each of the radiators is connected adjacent its top and at the end remote from the connection therewth of the steam inlet pipe 6, with the valve embodying the present invention and which is indicated as a whole by thefnumeral 11 and leads to a suitable water lead-oil? pipe such as a sewer pipe` while i the other enters a: suitable :air i lead-off pipe such as a chimney. In a system of "this character where the air and steam escape pipe is not controlled inany manner, both water and steam are constantly escaping from the hea'ting' system and consequently a constant watch must be kept upon the boiler of the system to 'keep up the proper steam pressure and also considerably more fuel is employed to keep the steam up to the proper pressure than is necessary r where a control valve of the character herein described; is employed. i

The valve structure embodying the principal feature of. the present invention consists of an elongated shell 13 which is open at each end and y 4 has each end exteriorly threaded as indicated by the numerals 14 and 15. Intermediate its ends the shell 13 is closed by 'a relatively thick partition wall 16 through which is formed eccentrically, the passage' 17.

Formed integral with the shell or body 13 is an exteriorly threaded tubular stem 18, the passage 19 of which leads into the thickened portion 16, into the lower end of the short 'vertically disposed tube 20 which is mounted in the upper end of the thickened portion 16 and stands upright in the upper end of the shell as shown in Figura-2. The upper end of this tube 20 is normally closed by a ball 21.

Within the upper end of the 'shell is a ring` 22 which surrounds the ball 21, and prevents it permanently leaving the upper end of the tube 20. The upper end of the shell 13 is closed by the cap 23 which retains the ring 22 in place and which has a packing disc 24 against its inner face, which prevents the escape of steam from the upper end of the shell. i i

The threaded lower end 15 of the shell is coupled with the pipe 12 by a suitable coupling co1- lar and the threaded end of the stern 18 engages in an aperture in the end unit of the radiator to which it is attached.

In the operation of the twoline steam system equipped with the valve structure herein described, the steam passes through the pipes 2,

ioo

through the passage 19 of the valve 11 past the ball check 21 and into the air and steam return pipes 12 and 7. The air driven into the pipe 7 escapes by passing upwardly through the pipe 9 and out past the valve 10 whereas any water which may have condensed in these pipes, or any steamwhich is passed on through the radiators will flow back into the boiler 1 and thus be saved. By providing the ball check 21, steam is prevented. from passing through one radiator and through the pipes 12 and '7 to another radiator. Because of this when any one or more radiators of a system are turned off steam will not' stand and condense in the radiator which is not in use and the valve will therefore act to prevent water collecting in the radiator.

Having thus described the invention, what is claimed is:- r

1. A valve of the character described, comprising an elongated body having a chamber in one end', thebody being in vertical position with the .chamber at the upper end When in operation, a

tube secured at one end in the bottom of the chamberand extending longitudinally of the at one side of the tube to and opening through the end of the body opposite the chamber, a ball check normally seated in the said other end of the tube, an annular member in 'the chamber concentric therewith and with said tube and encircling said ball check to confine the same to limited movement relative to the tube, and a removable cap closing the chamber. r

g 2. A valve of the character described, comprising an elongated body having a chamber in one end, the body being in Vertical position with the chamber at the upper end when in operation, a tube secured atione end in the bottom of the chamber and extending longitudinally of the body, the other end of the tube terminating short of the adjacent end of the body, a lateral tubular stem joined to the side of the body and in communication through a passage with the said one end of said tube, the said body having a passage leading from the bottom of the chamber at one side of the tube to and opening through the end of the body opposite the chamber, a ball check normally seated in the said other end of the tube, a member removably disposed in the chamber and encircling said ball check to confine the same to limited movement relative to the tube, and means for removably securing the member in position in the chamber.

EDWARD C. BOLDT. 

